Excellent program on Discovery channel last night entitled "Nuclear Jihad". If you ever have a chance to watch it would be worth your time Dr. A.Q. Khan singlehandedly created Pakistan's nuclear bomb and sent the same technology to N. Korea, Iran, Libya, and who knows where else. Seems one doesn't need a nuclear reactor to manufacture enriched uranium. China gave away a simple blueprint for bomb making 20 years ago.
Real scary stuff.